Cosmologists are heading back to their chalkboards as the experiments designed to figure out what this unknown 84 percent of our universe actually is come up empty.

The Chalk River Laboratories in 2012. Canada’s role as a world leader in neutron-scattering is at risk because of a failure to invest in infrastructure renewal at the facility.
THE CANADIAN PRESS/Sean KilpatrickSeptember 27, 2017

The hunt for long-lived superheavy elements has taken another leap forward now we’ve confirmed the existence of Element 117, also known as ununseptium. It was first seen briefly by a team of US and Russian…